Organizations like the Simon Wiesenthal Center assemble lists of known war criminals[1] and then forward them to police in Germany and other countries, who then

Organizations like the Simon Wiesenthal Center assemble lists of known war criminals[1] and then forward them to police in Germany and other countries, who then assess the charges and, if found valid, try to press them (assuming they can still find the accused). It's a slow process, and one or two turn up every year. [2] has the arrest of a similar case. The case that set the precedent for these was John Demjanjuk[3], which, while so long that he died before the final hearings, cleared up the legal situation. [1] https://en.wikipedia.org/wiki/List_of_Most_Wanted_Nazi_War_Criminals_according_to_the_Simon_Wiesenthal_Center https://en.wikipedia.org/wiki/List_of_Most_Wanted_Nazi_War_C... [2] http://www.bbc.co.uk/news/world-europe-22427976 http://www.bbc.co.uk/news/world-europe-22427976 [3] https://en.wikipedia.org/wiki/Demjanjuk https://en.wikipedia.org/wiki/Demjanjuk